Darling Harbour Strummer

The calm, assured manner of someone who clearly didn't start yesterday. Maybe this is how the jangly mojo boys might evolve. Pare down the equipment - (but add a chair), keep the material 'up' but also a little more 'easy'. And select locations that do some of the work for you.
The jangly boys had passerby volume, but also a lot of sonic competition. Mr Strummer here had an acoustic advantage but also a spot with a killer backdrop and natural lingerability.
Darling Harbour maintains a steady stream of foot traffic and the atmosphere is ripe for stopping and taking in just what he was offering. So, I'd rate him 'seasoned'.
(What was that song, though? It sounded like it could go forever...)